Nanoporous Li2S and MWCNT-Linked Li2S Powder Cathodes for Lithium-Ion Battery Chemistries
Abstract
The fully-lithiated Li2S (having theoretical gravimetric and volumetric capacities of 1166 mAhg-1 and 1935 mAh·cc-1) has been viewed as a promising cathode material because of its low cost, high capacity and compatibility with Li-free anodes (e.g., graphite or Si/Sn-based composites). In addition, the use of anodes that undergo small volume changes during cycling (such as graphite) makes it easier to form a stable electrically insulative SEI, which is permeable to Li ions but impermeable to polysulfides, thus eliminating the irreversible side reactions between polysulfide anion and Li metal and allowing one to minimize or avoid the gradual cathode dissolution and stabilize the chemistry of such cells [1, 2].
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2014
- Source ID
- 10.1149/ma2014-01/43/1622
Entities
People
- Alexandre Magasinski
- Feixiang Wu
- Gleb Yushin